I really have no words to describe how great this chart is, except maybe, "very good":

No fewer than seven information packed variables can be plotted in this new chart form: Three conveyed by position along the x-axis, y-axis and z-axis. Another two by the columns’ length and width. The size of the the stacks within the column along with the conventional partitions of the pies atop the columns round out our seven variables.

Also, I wish to apologise for my lack of posts recently - i've been quite busy, and well, i've had nothing interesting to say.